122 



Botanical description (B. Fl., vii, 576). A slender, tufted grass, 

 closely resembling the typical form of A. scdbra, with still finer leaves. 



Panicle loose, with long capillary branches or contracted in some of the smaller 



specimens. 



Outer glumes very acute, about 1 line long. 

 Flowering glume shorter, broad, hyaline, and remarkably truncate, enveloping the 



flower, with a dorsal twisted awn, affixed very near the base and protruding 



beyond the outer glumes. 

 Palea none. 



Value as a fodder. Unknown. 



Habitat and range. Eound in all the Colonies. In New South 

 Wales found in southern mountainous (particularly Alpine) districts. 

 We have it from Pretty Point (Mt. Kosciusko), 5,500 feet. 



55. DEYEUXIA. 



Spikelets one-flowered, pedicellate or rarely sessile in a panicle 

 either loose and spreading or narrow and spikelike, the rhachis of the 

 spikelet articulate above the outer glumes, usually bearing a tuft of 

 hairs round the flowering glume and usually produced beyond it in a 

 small ciliate or rarely glabrous bristle very rarely bearing an empty 

 glume or imperfect flower, sometimes very minute, rarely deficient. 



Glumes three ; two outer ones persistent, keeled, unawned, flower- 

 ing shorter and very thin, about as long or rarely longer and mem- 

 branous, broad, enclosing the flower, five-nerved, with a fine dorsal 

 awn usually bent and twisted, rarely short and straight or very rarely 

 deficient. 



Palea thin, more than half as long as the glume, faintly or promin- 

 ently two-nerved. 



Styles distinct, short. 



Grain enclosed in the glume and palea and sometimes partially 

 adhering to them. 



Flowering glume very thin, almost hyaline, much shorter than the 



empty ones. 

 Panicle loose and spreading or in smaller plants narrow. Rhachis 



of the spikelet produced into a hairy bristle. 

 Spikelets 1^ to 2 lines long. Flowering glume usually hairy, 

 truncate, or shortly-toothed, the awn about the middle. 

 Panicle spreading ... ... ... ... ... . . . 2. D. Forsteri. 



Spikelets about 3 lines. Flowering glume glabrous, with two 



long points, the awn almost basal. Panicle spreading ... 4. D. BiUardieri. 

 Spikelets about \\ lines. Flowering glume hairy, with two 



long points, the awn almost basal. Panicle narrow ... 5. D. pleheia. 

 Panicle dense and spikelike or shortly branched. Rhachis of the 

 spikelet produced into a glabrous or minute bristle or not 

 continued beyond the flower. 

 Spikelets 2 to 2| lines long. Awn almost basal. Bristles of 



the rhachis conspicuous ... ... ... ... ... 6. D. montana. 



Spikelets 1 to 2 lines. Awn almost basal. Bristle of the 



rhachis minute or none ... ... ... 7. D. qnadriseta. 



Flowering glume nearly or quite as long as the outer ones, membranous, 



often minutely scabrous or pubescent. 

 Panicle very loose and long. Awn dorsal about the middle of the 



flowering glume but very deciduous... ... ... ... \\.D.frigida. 



